Food

Before you feed stray cats, first, make sure it isn't illegal to feed stray cats where you live, because believe it or not, in some places, feeding stray cats is not allowed.

If it is legal, then dry food works best in winter unless you know that the cats will eat the food you put out immediately. If canned cat food sits outdoors it generally freezes which will make it hard for the cat
to eat it. For more about the pros and cons of feeding stray cats click: here.

Water

Cats, like all living creatures, need water. The problem with water in the winter is that it freezes into ice.

Here are a few tips for preventing the water from turning into ice:

Use dark colored pet bowls and place them in the sun during the day.

Use rubber pet bowls because it takes the water longer to freeze than other types of bowls.

Fill the pet bowl with warm water so it takes longer to freeze.

Use a heated pet bowl - hard to do outside though.

Use Larger pet bowls - larger bodies of water take longer to freeze than smaller ones.

Shelter

Stray cats will need some place where they can shelter.

Shelters can either be bought, or these can be made. My father actually built the stray cats on his property a little heated outdoor cat house.

Of course you don't need anything as elaborate as that - even something simple will do such as shown in the following You Tube video at the bottom of this article.

You could even use an existing structure, such as a garage. Just make sure to put blankets out there for the cat to sleep on or in.

If you prefer to buy a cat house you can get these fairly inexpensively, such as these heated cat houses below. They make them for single cats or for multiple cats:

Of course for the cat house to be heated you will need to hook it up to an electricity source.